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Over 20,000 problems available: AMC 8/10/12 and AIME problems from 2010-2024; USAJMO/USAMO problems from 2002-2024; USACO problems from 2014 to 2024 (all divisions); all Codeforces, AtCoder and DMOJ problems. If you leave the search field blank, it returns all problems with the specified type.

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  • AMC 8: [year] AMC 8 Problem #, Ex: 2013 AMC 8 Problem 1
  • AMC 10: [year] AMC 10A Problem # OR [year] AMC 10B Problem #, Ex: 2015 AMC 10A Problem 16
  • AMC 12: [year] AMC 12A Problem # OR [year] AMC 12B Problem #, Ex: 2021 AMC 12B Problem 25
  • AIME: [year] AIME I Problem # OR [year] AIME II Problem #, Ex: 2013 AIME I Problem 8
  • USAJMO/USAMO: [year] USAJMO/USAMO Problem #, Ex: 2023 USAJMO Problem 1
  • Codeforces: Codeforces [contest id (e.g. 101)][problem id (e.g. A, B, C)]: [Codeforces problem name], Ex: Codeforces 1336F: Journey
  • AtCoder: AtCoder [contest id (e.g. ABC314, ARC164, ZONE2021)]: [problem id (A, B, C)]. [Problem name], Ex: AtCoder ZONE2021: E. Sneaking
  • DMOJ: DMOJ [contest name (if applicable)] [problem number (e.g. P1)] - [Problem name], Ex: DMOJ Yet Another Contest 3 P1 - Shell Swap Scam
  • USACO: [year] [contest month (e.g. January, US Open)], [division (e.g. Gold)]: [Problem name], Ex: USACO 2023 US Open Contest, Bronze: Rotate and Shift

ID Problem Name (click to add insights/hints, view summary of insights/hints and similar problems)
14690 AtCoder TYPICAL90: 054. Takahashi Number（★6）
14689 AtCoder TYPICAL90: 053. Discrete Dowsing（★7）
14688 AtCoder TYPICAL90: 002. Encyclopedia of Parentheses（★3）
14687 AtCoder TYPICAL90: 052. Dice Product（★3）
14686 AtCoder TYPICAL90: 051. Typical Shop（★5）
14685 AtCoder TYPICAL90: 050. Stair Jump（★3）
14684 AtCoder TYPICAL90: 049. Flip Digits 2（★6）
14683 AtCoder TYPICAL90: 048. I will not drop out（★3）
14682 AtCoder TYPICAL90: 047. Monochromatic Diagonal（★7）
14681 AtCoder TYPICAL90: 046. I Love 46（★3）
14680 AtCoder TYPICAL90: 045. Simple Grouping（★6）
14679 AtCoder TYPICAL90: 044. Shift and Swapping（★3）
14678 AtCoder TYPICAL90: 043. Maze Challenge with Lack of Sleep（★4）
14677 AtCoder TYPICAL90: 042. Multiple of 9（★4）
14676 AtCoder TYPICAL90: 041. Piles in AtCoder Farm（★7）
14675 AtCoder TYPICAL90: 040. Get More Money（★7）
14674 AtCoder TYPICAL90: 039. Tree Distance（★5）
14673 AtCoder TYPICAL90: 038. Large LCM（★3）
14672 AtCoder TYPICAL90: 037. Don't Leave the Spice（★5）
14671 AtCoder TYPICAL90: 036. Max Manhattan Distance（★5）
14670 AtCoder TYPICAL90: 035. Preserve Connectivity（★7）
14669 AtCoder TYPICAL90: 034. There are few types of elements（★4）
14668 AtCoder TYPICAL90: 033. Not Too Bright（★2）
14667 AtCoder TYPICAL90: 032. AtCoder Ekiden（★3）
14666 AtCoder TYPICAL90: 031. VS AtCoder（★6）
14665 AtCoder TYPICAL90: 030. K Factors（★5）
14664 AtCoder TYPICAL90: 029. Long Bricks（★5）
14663 AtCoder TYPICAL90: 028. Cluttered Paper（★4）
14662 AtCoder TYPICAL90: 027. Sign Up Requests （★2）
14661 AtCoder TYPICAL90: 001. Yokan Party（★4）
14660 AtCoder TUPC2022: O. Equidistant Binary String
14659 AtCoder TUPC2022: N. Matrix Game
14658 AtCoder TUPC2022: M. Fractal Tree Isomorphism
14657 AtCoder TUPC2022: L. Inversion High and Low
14656 AtCoder TUPC2022: K. Lebesgue Integral
14655 AtCoder TUPC2022: J. AMidA
14654 AtCoder TUPC2022: I. Count Setwise Coprime
14653 AtCoder TUPC2022: H. Next Permutation
14652 AtCoder TUPC2022: G. All Pairs
14651 AtCoder TUPC2022: F. Block Rotation
14650 AtCoder TUPC2022: E. 00-11 Rotation
14649 AtCoder TUPC2022: D. Zeta Sum
14648 AtCoder TUPC2022: C. Flip Grid
14647 AtCoder TUPC2022: B. Snowy Aobayama
14646 AtCoder TUPC2022: A. Sum Sort
14645 AtCoder TTPC2022: O. Parallel Processing
14644 AtCoder TTPC2022: N. Expanded Hull
14643 AtCoder TTPC2022: M. Many Products
14642 AtCoder TTPC2022: L. Range NEQ
14641 AtCoder TTPC2022: K. Peaceful Results
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